Question and Answer
Samples and Techniques
Which statement best explains why
enzymes bind to specific substrates?
An enzyme can be inhibited so its active site is altered
An enzyme folds differently in the presence of different substrates
Different amino acid sequences cause variations in the shapes of
an enzyme’s active sites
Enzyme-substrate binding is based on size so only large enzymes
can bind to large substrates
All of the above
Several of these molecules
connected in a chain result in a/anamino acid
sugar
nucleic acid
starch
all of the above
The monomers that make up
proteins are
amino acids
fatty acids
enzymes
glycerols
All of the above
Which is the most valid conclusion based
on the graph?
Raising the temperature always makes an
enzyme work better
Enzymes are not affected by temperature
Enzyme function decreases after a certain
favorable temp.
Enzymes are not affected by temperature
All of the above
Which statement best describes the
function of nucleic acids?
increases the rate of chemical reactions
stores genetic information and helps to make proteins
stimulates metabolism in all body cells
activates secretion of body’s hormones
all of the above
Large biological molecules are made up
of smaller subunits. What are these
smaller subunits called
monomers
polymers
enzymes
cells
all of the above
Which of the following is not a lipid
cholesterol
wax
cellulose
steroid
all of the above
After a biological molecule is analyzed, it is
discovered that the molecule is composed of
several amino acids. Which of these identifies
the biological molecule.
monosaccharide
lipid
saturated fat
protein
all of the above
Beeswax is which of the following
types of organic molecule?
nucleic acid
carbohydrate
lipid
protein
all of the above
A biomolecule that is large, complex set of
chains composed of alternating subunits
called nucleotides which of these functions in
the cell
Storing genetic information
Storing energy
Catalyzing cellular reactions
Building tissue
All of the above
Which biomolecule’s function is least
likely to be affected by the order of its
single molecule units?
starch
DNA
RNA
protein
all of the above
Many land plants store energy in starch. When
energy is needed, the starch molecules can be
broken down quickly. This chemical reaction
produces
RNA chains
amino acids
lipids
monosaccharides
all of the above
In humans and other multicellular organisms,
which substance plays a central role as an
energy source
protein
carbohydrate
DNA
water
All of the above
Which does a polymer most closely
resemble
chain
Link in a chain
intersection
circle
all of the above
Which is true about enzymes
They can not change their shape
After a reaction, they can not be reused
They act on nonspecific, randomly chosen substrates
They can speed up metabolic processes in the body
all of the above
The diagram below illustrates a biochemical process
that occurs in organisms. The substance labeled
catalyst also is known by what other name?
antibody
ion
enzyme
Inorganic compound
all of the above
How does the addition of heat affect
the ability of an enzyme to help the
sugar molecules form a bond?
Heat changes the enzyme so that the sugar molecules can not longer bond
Heat allows the sugar molecules to bond more quickely
Heat provides places on the enzyme for other molecules to bond
Heat changes the chemical composition of sugar so it no longer needs the enzyme
All of the above
What is the relationship between
monomers and polymers
Monomers are subunits of polymers
Monomers are macromolecules; polymers are micromolecules
Monomers are long, connecting chains of polymers
Monomers are larger, more complex versions of polymers
All of the above